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2017 sees a mild mid-cycle refresh to Mercedes’ flagship convertible, primarily work around the front fascia that includes new LED headlamps and grille and AMG body styling to the front apron and splitter. There’s also minor work done to the back. Cabin-wise, there’s a new sport steering wheel, revised instrument cluster and new trim bits. On the powertrain side, the SL-Class gains a new entry-level model, the SL 450, replete with 362-horsepower, twin-turbo 3.0-litre V6 and a new nine-speed automatic transmission (the SL 550 also gets the new autobox). In addition to those two models, there’s the performance-oriented Mercedes-AMG SL 63 and SL 65. Like the S-Class sedan, the SL 63 and SL 65 get hand-built AMG engines— a 577-hp, 5.5L V8 bi-turbo for the former and a 621-hp, 6.0L V12 for the latter — as well as seven-speed automatic transmissions.